enable project to run with jetty docker container

enable the payment service to be run inside jetty docker container

[example for jetty inside docker](https://dkbalachandar.wordpress.com/2016/04/18/dockerfile-to-deploy-a-war-file-on-jetty/)

```
FROM jetty:jre8
ADD sample.war /var/lib/jetty/webapps/root.war
EXPOSE 8080
```

```
docker build -t jetty .
docker run -p 8080:8080 jetty
```